A new technique for high frequency characterization of capacitors

Li, Y.L.; Figueroa, D.G.; Rodríguez, José; Huang, Li; Liao, Jun; Taniguchi, M.; Canner, James P.; Kondo, Takahiro

doi:10.1109/ectc.1998.678924

Cited by 29 publications

(8 citation statements)

References 4 publications

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“…ESR, however, is a very important characteristic and should be considered in practice. As the frequency increases, non-ideal inductor and capacitor values were simply modeled as an ideal inductor and capacitor in series with ESR [37, 38]. Additionally, circuit board performance such as trace characteristics, which might be attributed to the experimental results, was not taken into account for the simulation.…”

Section: Discussionmentioning

confidence: 99%

Impedance matching network for high frequency ultrasonic transducer for cellular applications

et al. 2016

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An approach for the design of an impedance matching network (IMN) for high frequency ultrasonic transducers with large apertures based on impedance analysis for cellular applications is presented in this paper. The main objectives were to maximize energy transmission from the excitation source to the ultrasonic transducers for cell manipulation and to achieve low input parameters for the safe operation of an ultrasonic transducer because the piezoelectric material in high frequency ultrasonic transducers is prone to breakage due to its being extremely thin. Two ultrasonic transducers, which were made of lithium niobate single crystal with the thickness of 15 μm, having apertures of 4.3 mm (fnumber = 1.23) and 2.6 mm (fnumber = 0.75) were tested. L-type IMN was selected for high sensitivity and compact design of the ultrasonic transducers. The target center frequency was chosen as the frequency where the electrical admittance (∣Y∣) and phase angle (θz) from impedance analysis was maximal and zero, respectively. The reference center frequency and reference echo magnitude were selected as the center frequency and echo magnitude, measured by pulse-echo testing, of the ultrasonic transducer without IMN. Initial component values and topology of IMN were determined using the Smith chart, and pulse-echo testing was analyzed to verify the performance of the ultrasonic transducers with and without IMN. After several iterations between changing component values and topology of IMN, and pulse-echo measurement of the ultrasonic transducer with IMN, optimized component values and topology of IMN were chosen when the measured center frequency from pulse-echo testing was comparable to the target frequency, and the measured echo magnitude was at least 30% larger than the reference echo magnitude. Performance of an ultrasonic transducer with and without IMN was tested by observing a tangible dent on the surface of a plastic petridish and single cell response after an acoustic pulse was applied on a target cell.

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Section: Discussionmentioning

confidence: 99%

Impedance matching network for high frequency ultrasonic transducer for cellular applications

et al. 2016

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“…In [7], the accuracy of previous technique was improved by obtaining gain and phase of capacitor voltage using discrete Fourier transform algorithm. Another method for characterization of AEC is suggested in [8].This method requires a network analyzer for measurement, thereby making it costly than other techniques.…”

Section: ) Offline Techniques;mentioning

confidence: 99%

“…TH is used to account for quantization error caused by ADC, that due to noise and error due to sensing elements. Its value is given by range sensing N+1 V TH= +E 2 (8) where, range is the full scale voltage range of ADC , N is the number of bits of ADC and E sensing is the error due to noise and sensing elements.…”

Section: Proposed Schemementioning

confidence: 99%

“…End of life criteria is a decrease of capacitance value by 2% [4]. Simulation is performed and the result is tabulated in [5], [6], [7], [8] Offline Capacitance and ESR Signal generator [5], Power amplifier [6,7] Network analyzer [8] medium [9], [10] Online ESR Voltage and current sensor high [11] Online ESR Voltage and current sensor high [12] Online ESR Voltage sensor low [13], [ This paper proposes a low cost and simple technique for a boost converter. This technique estimates both the ESR and C of the input capacitor of boost converter.…”

Section: A Solar Pv and Capacitor Modelsmentioning

confidence: 99%

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An online technique for condition monitoring of capacitor in PV system

Ahmad

Arya

Anand

2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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DC-DC converters are used to interconnect solar photovoltaic (PV) to a dc microgrid or to a battery. Capacitors are connected at the output of a PV terminal to minimize power pulsation. Operational life of capacitor decreases due to various electrical and environmental parameters. In this paper, a method for condition monitoring of the capacitors used in PV system is proposed. The technique combines the estimation of equivalent series resistance (ESR) and capacitance in one tool. This technique allows reliable prediction of capacitor life as compared to existing techniques. The proposed method can be implanted in the same microcontroller that is used for implementing the maximum power point tracking. To validate the efficacy of the method detailed simulation studies are performed in MATLABSimulink.

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“…Although calibration with a short circuit measurement can subtract this fixture inductance, good results cannot be expected when the quantity being subtracted is two orders of magnitude larger than the circa 1 nH inductance of the capacitors we are measuring. High-performance test-fixture design for measuring capacitors with network analyzers are addressed in [7], [8], [9], but these are subject to the limited accuracy at low impedance inherent in the network analyzer approach. To make accurate measurements in a lower impedance range, we used a high performance impedance analyzer (Agilent 4294A) with a new test fixture we developed that has stray inductance on the order of 100 pH, as described in detail in [10].…”

Section: Frequency-domain Measurementsmentioning

confidence: 99%

Improved distributed model for capacitors in high-performance packages

Sullivan

Sun

Kern

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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Time-domain and frequency-domain measurements show that a simple lumped RLC model for a multilayer ceramic capacitor is inadequate, overestimating high-frequency impedance by a factor of five. A lossy transmission-line model works better, and is improved by placing incremental resistance in series with the incremental capacitance. Refinements of this model are developed based on time-domain step-response measurements and on frequency-domain impedance measurements. Better packaging to reduce series inductance is discussed.

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A new technique for high frequency characterization of capacitors

Cited by 29 publications

References 4 publications

Impedance matching network for high frequency ultrasonic transducer for cellular applications

Impedance matching network for high frequency ultrasonic transducer for cellular applications

An online technique for condition monitoring of capacitor in PV system

Improved distributed model for capacitors in high-performance packages

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